①主动向老师请教,跟老师讨论、交流 ②主动跟老师打招呼
③看见老师躲着走,敬而远之 ④记住老师的名字以便有机会直呼老师名字
A:①③
B:②③
C:③④
D:①②
There are 15 _____ in the hospital. They are all friendly to the patients.
钢索桥的____很大。